I think the only advice you could give is pull the motor out as its dead get it in a engine stand or on trolly and strip it bare.. i would think running no oil psi the bores will be dead so get it rebored with new pistons or try and find a recon bottom end.. how ever the head work you had done that maybe damaged now dependn how long its been run or drove with no oil psi the camshaft and lifters would of suffered